import axios from 'axios'
import { Notification, MessageBox, Message, Loading } from 'element-ui'
import store from '@/store'
import moment from 'moment';
import { getToken } from '@/utils/auth'
import errorCode from '@/utils/errorCode'
import { tansParams, blobValidate } from "@/utils/hici";
import cache from '@/plugins/cache'
import * as XLSX from 'xlsx';
import { saveAs } from 'file-saver';

let downloadLoadingInstance;
// 是否显示重新登录
export let isRelogin = { show: false };

axios.defaults.headers['Content-Type'] = 'application/json;charset=utf-8'
// 创建axios实例
const service = axios.create({
  // axios中请求配置有baseURL选项，表示请求URL公共部分
  baseURL: process.env.VUE_APP_BASE_API,
  // 超时
  timeout: 100000
})

// request拦截器
service.interceptors.request.use(config => {
  // 是否需要设置 token
  const isToken = (config.headers || {}).isToken === false
  // 是否需要防止数据重复提交
  const isRepeatSubmit = (config.headers || {}).repeatSubmit === false
  if (getToken() && !isToken) {
    config.headers['Authorization'] = 'Bearer ' + getToken() // 让每个请求携带自定义token 请根据实际情况自行修改
  }
  // get请求映射params参数
  if (config.method === 'get' && config.params) {
    let url = config.url + '?' + tansParams(config.params);
    url = url.slice(0, -1);
    config.params = {};
    config.url = url;
  }
  if (!isRepeatSubmit && (config.method === 'post' || config.method === 'put')) {
    const requestObj = {
      url: config.url,
      data: typeof config.data === 'object' ? JSON.stringify(config.data) : config.data,
      time: new Date().getTime()
    }
    const sessionObj = cache.session.getJSON('sessionObj')
    if (sessionObj === undefined || sessionObj === null || sessionObj === '') {
      cache.session.setJSON('sessionObj', requestObj)
    } else {
      const s_url = sessionObj.url;                  // 请求地址
      const s_data = sessionObj.data;                // 请求数据
      const s_time = sessionObj.time;                // 请求时间
      const interval = 1000;                         // 间隔时间(ms)，小于此时间视为重复提交
      if (s_data === requestObj.data && requestObj.time - s_time < interval && s_url === requestObj.url) {
        const message = '数据正在处理，请勿重复提交';
        console.warn(`[${s_url}]: ` + message)
        return Promise.reject(new Error(message))
      } else {
        cache.session.setJSON('sessionObj', requestObj)
      }
    }
  }
  return config
}, error => {
    console.log(error)
    Promise.reject(error)
})

// 响应拦截器
service.interceptors.response.use(res => {
    // 未设置状态码则默认成功状态
    const code = res.data.code || 200;
    // 获取错误信息
    const msg = errorCode[code] || res.data.msg || errorCode['default'] ||res.msg
    // 二进制数据则直接返回
    if (res.request.responseType ===  'blob' || res.request.responseType ===  'arraybuffer') {
      return res.data
    }
    if (code === 401) {
      if (!isRelogin.show) {
        isRelogin.show = true;
        MessageBox.confirm('登录状态已过期，请重新登录', '系统提示', { confirmButtonText: '重新登录', showCancelButton: false, type: 'warning' }).then(() => {
          isRelogin.show = false;
          store.dispatch('ExceptionLogOut').then(() => {
            location.href = '/index';
          })
      }).catch(() => {
        isRelogin.show = false;
      });
    }
      return Promise.reject('无效的会话，或者会话已过期，请重新登录。')
    } else if (code === 500) {
      Message({ message: msg, type: 'error' })
      return Promise.reject(new Error(msg))
    } else if (code === 601) {
      Message({ message: msg, type: 'warning' })
      return Promise.reject('error')
    } else if (code === 602) {
      let codeInfo={code:code}
      return Promise.reject(codeInfo)
    }else if (code !== 200) {
      Notification.error({ title: msg })
      return Promise.reject('error')
    } else {
      return res.data
    }
  },
  error => {
    console.log('err' + error)
    let { message } = error;
    if (message == "Network Error") {
      message = "后端接口连接异常";
    } else if (message.includes("timeout")) {
      message = "系统接口请求超时";
    } else if (message.includes("Request failed with status code")) {
      message = "系统接口" + message.substr(message.length - 3) + "异常";
    }
    Message({ message: message, type: 'error', duration: 5 * 1000 })
    return Promise.reject(error)
  }
)

// 通用下载方法
export function download(url, params, filename, config,type='post') {
  downloadLoadingInstance = Loading.service({ text: "正在下载数据，请稍候", spinner: "el-icon-loading", background: "rgba(0, 0, 0, 0.7)", })
  let requestParam = {} 
  if(type === 'get'){
    requestParam = {
      url: url,
      method: 'get',
      params: params,
      responseType: 'blob'
    }
  }else {
    requestParam = {
      url: url,
      method: 'post',
      data: params,
      responseType: 'blob'
    }
  }
  return service(requestParam).then(async (data) => {
    const isBlob = blobValidate(data);
    if (isBlob) {
      const blob = new Blob([data])
      saveAs(blob, filename)
    } else {
      const resText = await data.text();
      const rspObj = JSON.parse(resText);
      const errMsg = errorCode[rspObj.code] || rspObj.msg || errorCode['default']
      Message.error(errMsg);
    }
    downloadLoadingInstance.close();
  }).catch((r) => {
    console.error(r)
    Message.error('下载文件出现错误，请联系管理员！')
    downloadLoadingInstance.close();
  })
}

// iqc详情下载方法
export function downloadDetail(url, params, filename, config) {
  downloadLoadingInstance = Loading.service({ text: "正在下载数据，请稍候", spinner: "el-icon-loading", background: "rgba(0, 0, 0, 0.7)", })
  return service.post(url, params, {
    transformRequest: [(params) => { return tansParams(params) }],
    headers: { 'Content-Type': 'application/json;charset=utf-8' },
    responseType: 'blob',
    ...config
  }).then(async (data) => {
    const isBlob = blobValidate(data);
    if (isBlob) {
      const blob = new Blob([data])
      saveAs(blob, filename)
    } else {
      const resText = await data.text();
      const rspObj = JSON.parse(resText);
      const errMsg = errorCode[rspObj.code] || rspObj.msg || errorCode['default']
      Message.error(errMsg);
    }
    downloadLoadingInstance.close();
  }).catch((r) => {
    console.error(r)
    Message.error('下载文件出现错误，请联系管理员！')
    downloadLoadingInstance.close();
  })
}

/* 前端导出excel */
export function exportExcel(dataStructure,filename) {
   // 将数据转换为工作表
   const ws1 = XLSX.utils.json_to_sheet([]);

   let startCol = 65, startRow = 1, endCol = 65, endRow = 1, blockCount = 0;
   if (dataStructure.form) {
     let col = 65, row = 1;
     let keys = Object.keys(dataStructure.form.labelFieldMap);
     for (let i = 0; i < keys.length; i += 2) {

       let key = keys[i];
       col = 65
       if (dataStructure.form.labelFieldMap[key].display == "block") {
         // row++;
         ws1[String.fromCharCode(col) + row] = { t: 's', v: dataStructure.form.labelFieldMap[key].label, z: '' }
         col++;
         ws1[String.fromCharCode(col) + row] = { t: 's', v: dataStructure.form.valueFieldMap[key]?dataStructure.form.valueFieldMap[key]:'', z: '' }
         row++;
         blockCount++;
       } else {
         ws1[String.fromCharCode(col) + row] = { t: 's', v: dataStructure.form.labelFieldMap[key], z: '' }
         console.log("ws1", ws1[String.fromCharCode(col) + row])
         col++;
         ws1[String.fromCharCode(col) + row] = { t: 's', v: dataStructure.form.valueFieldMap[key]?dataStructure.form.valueFieldMap[key]:'', z: '' }
         console.log("ws1", ws1[String.fromCharCode(col) + row])
         col++;
       }
       if (i == keys.length - 1) {
         continue;
       }

       key = keys[i + 1];
       if (dataStructure.form.labelFieldMap[key].display == "block") {
        row++;
         col = 65;
         ws1[String.fromCharCode(col) + row] = { t: 's', v: dataStructure.form.labelFieldMap[key].label, z: '' }
         col++;
         ws1[String.fromCharCode(col) + row] = { t: 's', v: dataStructure.form.valueFieldMap[key]?dataStructure.form.valueFieldMap[key]:'', z: '' }
         blockCount++;
         row++;
       } else {
         ws1[String.fromCharCode(col) + row] = { t: 's', v: dataStructure.form.labelFieldMap[key], z: '' }
         console.log("ws1", ws1[String.fromCharCode(col) + row])
         col++;
         endCol = col;
         ws1[String.fromCharCode(col) + row] = { t: 's', v: dataStructure.form.valueFieldMap[key]?dataStructure.form.valueFieldMap[key]:'', z: '' }
         console.log("ws1", ws1[String.fromCharCode(col) + row])
         row++;
       }

     }
     // if ((keys.length - blockCount) % 2 == 1) {
     //   col = 65;
     //   let key = keys[keys.length - 1];
     //   if (dataStructure.form.labelFieldMap[key].display == "block") {
     //     ws1[String.fromCharCode(col) + row] = { t: 's', v: dataStructure.form.labelFieldMap[key].label, z: '' }
     //   }
     //   col++;
     //   ws1[String.fromCharCode(col) + row] = { t: 's', v: dataStructure.form.valueFieldMap[key], z: '' }
     //   console.log("ws1", ws1[String.fromCharCode(col) + row])
     //   col++;
     //   row++;
     // }
     endRow = row;
   }
   endRow++;
   ws1[String.fromCharCode(65) + endRow] = { t: 's', v: dataStructure.sep, z: '' }
   endRow++;
   if (dataStructure.list) {
     let col = 65, row = endRow + 1;
     let keys = Object.keys(dataStructure.list.labelFieldMap);
     for (let i = 0; i < keys.length; i++) {
       let key = keys[i];
       ws1[String.fromCharCode(col) + row] = { t: 's', v: dataStructure.list.labelFieldMap[key], z: '' }
       col++;
     }
     row++;

     for (let i = 0; i < dataStructure.list.data.length; i++) {
       let item = dataStructure.list.data[i];
       col = 65;
       for (let j = 0; j < keys.length; j++) {
         let key = keys[j];
         ws1[String.fromCharCode(col) + row] = { t: 's', v: item[key]?item[key]:'', z: '' }
         col++;
         endCol = col;
       }
       row++;
     }
     endRow = row;
   }
   ws1['!ref'] = `${String.fromCharCode(startCol)}${startRow}:${String.fromCharCode(endCol)}${endRow}`
   // 创建工作簿并添加工作表
   const wb = XLSX.utils.book_new();
   XLSX.utils.book_append_sheet(wb, ws1, 'Sheet1');

   // 生成Excel文件
   const wbout = XLSX.write(wb, { bookType: 'xlsx', type: 'binary' });

   // 字符串转ArrayBuffer
   function s2ab(s) {
     const buf = new ArrayBuffer(s.length);
     const view = new Uint8Array(buf);
     for (let i = 0; i !== s.length; ++i) view[i] = s.charCodeAt(i) & 0xFF;
     return buf;
   }

   // 保存文件
   saveAs(new Blob([s2ab(wbout)], { type: 'application/octet-stream' }), `${filename}_${moment(new Date()).format('yyyyMMDDHHmmss')}.xlsx`);
 
}

export default service
